Art of extruding metals.



PATENTED` AUG. 18, 1908.

G. H. BENJAMIN. ART 0F EXTRUYDING METALS.

APPLIGATION FILED JUNE 9,1906.

PATENTED AUG'. 18. 190s G. H. BENJAMIN.

ART 0F BXTRUDING METALS.

APPLGATION FILED JUNE 9,-1906.

No. 896,683i

WITNESVSES: Mm @mm/fm l tion'of the atmosphere,

"trusion machine is immaterial.

GEORGE HILL/XRD BENJAMIN, 0F NEW YORK, N. Y.

y.ART 0F EXTRUDING METALS.

no. senese.

Specieaftion of Letters Patent.

Patented sag. is, isos.'

application sied nuwe, 190e. sans no. ezines.

To all whom it may concern:

Be it known that I, GEORGE HILLARD BEN- JAMIN, a citizen of the UnitedStates, residing in the city, county, andState of New York, haveinvented an Improvement in the Art of Extruding Metals, of which thefollow# inf` is a specification. lly invention relates to vanimprovement in the art of extruding metals and consists in the modo of oeration ,described herein. f Heretofore 1t has been found nractically imossible to extrude certain. mete s and metal io allo s, owing to thefact vthat they can be extruded only When at certain definitetemperatures, and that it has been found impossible to raise thesebodies to the required temperature and maintain them et such temperature during the length of time necessary to convey them from theheating furnace to the extrusion machine and during the act oizextrusion. This difficulty l have overcome by the mode of operation andapparatus which l will now proceed to describe.

Considered broadly, rny" invention consists in first heating the billetto be entrii'ded, then introducing such billet into the containerwithout exposing it to tho coolinw acand finally pus ring the billetthrough the die of the container. The accompanying drawings will serveto .illustrate such apparatus es l may employ, in which A y Figure 1, isa lan view partially in section 5 Fig. 2, a parting elevation andvertical sec* tion, showing the container in the receiving position'withthe billet to be extruded within the container; Fig. 3, is a similarview, showing the container in the extruding position, with the billetin the positionto be acted on ly the ram. Fig-.11, is a transversesection of he extrusion machine shown in thev drawings is that disclosedin U. S. Patent No. 819,261, granted to W; A. `Wood, May 1, 1906,

and consists essentially of the followlngparts: j y A container', 5, a h

draulic rain 6, und a die 7, .The particular ormor construction ofexfor'rnsrexist, and they all may beused.- It is only necessary that thecontainer should he .mounted upon trunnions 8, yand means be provided,suchas a crank 9, and gears 10, for

changing-fthe position fof the container from Difi'erent e horizontal,'as shown in Fig. 3to vertical, as

shown 1n Fig. 2, or preferablyv to :pri'ivide for complete rotation ofthe cylinder ortho perf pose which will be hereinafter described.

" The billets to be extruded. l prefertofheat` ro ressivel i. e. asth'ev are carriedjito- P il' Y: f

wards' the extrusion machine, and yto, ac-`y eornplish this result lprovide a rotary heat,v i

Thisapparetus consists esl ing ap' aratus.

sentiel y of a series oi furnaces 12", 13, '1. .and

15, supported upon a spider 16, niountedto rotate raround a cylindricaltubular-bearing 1.7. Means is provided for rotating the spider, whichconsists of a gearlft, worm 19, s

:dit 20, bevel gears 21, 22, a hand vheel 2S. 'Gf course, any othersuitable means may be provided 'for rotating the furnaces.

Each of the furnaces i2', 13, 14 and l5 consists oi o. tubular casing24, lined wyith. lire brick, and provided with a movable bottoni 25.

ers 26, through which gas and air may be ad- These furnaces' areprovided with burnmitted and subsequently ignited within the furnace.Preferabl f. anon-oxidizing Haine is employed.- The caring ,17 is hollowand through it the gas is carried, being introduced through an opening27, and emitted through an opening 23, into a channel 29, communicatingwith a pipe 30. The nir is introduced through a channel 31, surroundingthe shaft of thespider, and is emitted into a channel 32, communicatingit will he observed that the pipes 30 and 33 combine, asis usualLto formthe burners 26.

Situated under the container 5 is a hy draulic cylinder 3st-, anexternalmember 35, adapted to cooperate with the movable bottoni 25ofthe furnaces as f they are rotated over vthe cylinder 34.

The furnaces l2, 13, 14 and 15 are shown as open at the top, andcovering three of these urnacesis a' disk Serden 36, provided withopenin's 37. This screen has a projection 38, which co-acts with the ythe container is rotated from the vertical. to the horizontal position,and serves to prevent the heated billet from sli ping out of thecontainer during the act ochanginv from one position to the other','Situated over the screen'3-6 are covers 40 for the furnaces Above thedish 36, and between it andthe extrpsion ,mae are, there might belplacedV a hood ior carnitine away with a pipe 33.

the piston of which has container 5, whenA the .products oficoxnlesbustion from the furnaces, but owing to the fact that the combustion inthese furnaces is perfectly controllable, such hood is not essential.

ln the drawings l have shown tour tun naces. l do not limit myself tothe 'number of furnaces, nor do l. limit mysclt i rise to theconstruction disclosed, it may be very considerably vr departing fromthe intent of in in'.

'The mode of operation which l. empio-v is as follows: The billet 50, tobe eiitr'u i.

inserted into the furnace l2 at the joositioi. marked. A, `and the laxneturned into tn furnace; After a time the lurnace l2 is rctated to the'position marked "3, then to the position marked C, then to the post-vtion marked D. l/Vhen the furnace l' in the D position, the cont/einerin from the horizontal to the vertical positie. i. e., from theAposition ot Fig. 3 to the pif tion of Fig. 2. The hydraulic cylinderSift then operated, with the etleet that its 'i'.einv l ber moves underthe movable bottoni 25 and lifts the billet into the cavity ol thecontainer 5. Immediately, the container is rotated to the position shownin Fig. f5, and container and die 'Y adjusted other. The .rarn 6 isthen. driven container and against the billet to i ish tbc billetthrough the die 7. inin'iefiia atter- .Wards, the ram withdrawn ai the nnei-cc l5, which has followed the increment o` furnace l2, brought underthe container and the action repeated. t sometimes harpens that the endol a billet .sticks in the lor- Ward end of the container, in which caseit is necessary to remove it. lts removal can be facilitated byre'vcrsely rotating the cont: 'ner 5, so that ite forward end shall lieover an empty Furnace with the llame in .lull play in the furnace. Theheat from the Aurnacc sullicicnt to inelt the material in the containcr, so that it may be readily removed.

ln the case ol alloys, as for instance, cor-- tuin zinc alloys, whichare triable above and below their cxtruding temperature, l.i heet thcbillet to a temperature above 'that at which it can be extruded, thatis, the billet is progressively heated in the lurnuces l2, l i4 and l5,or .inonc ol" them, as l'or instance, the furnace li., into which thebillet may inserted when said furnace in the location designated by A.the 'l'uri'iuce l if;

stepped around l'ronl. the position to posi-- tion il, to position undto position l), the billet may be progressively lmatcd. or it nniy beprogressively heated tlnoiurholit any portion of the movement olA thelui-nace l2. .l then reduce the temperature olA the billet when thefurnace occupies the posi tion.l),yno heat being turned on, to an ex-`trudahle condition, after which the billet is introduced directly intothe container Without exposing it to the atmosphere, and then u to euchinto the l subjected to pressure to drive it throughthe i die. @itcourse, the temperature of the, billet might be reduced when thefurnace"\vas 'in seine other position than that indicated by lll, as,for instance, when at C, or When passing from C to D and at D.

The construction of in lli, and l5 is such that ly character of theatmosphere therein. When heating billets el certain metals and alloys,is very desirable to maintain a reducing or non-oxidizing atmospherewithin the furnace, so es to prevent oxidation. As the billet may heinserted directly into the container from the furnace .containing areducing atmosphere, l avoid exposing it to the atmosuhcre, that is,atmospheric air, which would have a tendency te oxidize the billet. Thenecxidining atmosphere o'i the furnace dis es atmospheric air in theimmediate ity et the mouth of the furnace, as is understood, and by myprocess I sensing the heated billet to the inllu el an. oxidizingatmosphere.

i thus described iny invention, l

furnaces l2, 13,

bf extrudiug 'if/iden consists in exposing' the billet to heat until 'tis in an extrtulable condition, i into the container without exi theatmosphere, and iinally subit to pressure to force it through a die.p'iovcnicnt in the art of extruding' ucli. consists in subjecting thebillet n heat and a non-oxidizing ie in un extrudablc condiinto acontainer without ine tais atinosnhr. tion, iii't o lncml exposing it'to subiectii'ag it to y die. K

An improvement in the art oi extruding metals which consists in `lirstheating the billet to a temperature shove that at which it can beextruded, then reducing the tenuicrature to oi-ing it to an extrudablecondition, thon introdiufing the billet into a container ndhout exposingit to the :'Ltinosphcre, and then subjecting it to Vpressure to drivethe billet through a die. l

5. An i1nprovcincnt in the art of extruding metals which. consists inheating the' billet 'while advancing it toward the container, thenintroducing it quickly into the c`on` taincr, and then subjecting it tovpressure to dri vc the billet through a die.

nn Iinuirevement in the art el' extruding ure to force `it through a .11 ruding temperature, and maintaining l it at suon. temperature untilextruded.,

atmosphere, and finally metals which consists .in heating the billet to'may regulate the 7. An im rovement in the art of extrudingV 8. Animrovernent in the art oi extruding metals Whie consists in suljeet-ingtl1e billet to a regulatable temperature to heat it to theextrudlng temperature, and maintaining said billet at the extrudingtemperature until ex- 9. An improvement in the art of extruding 'metalswhiqh consists in sub'ecting the billet ractically maintaining.

tion, and maintaining it at apiroximately such temperature until extrude10. An improvement in the art of extruding metals ormetallic alloys,volatile at a high temperature', which consists in applying heat untilsuch a body is in an extrudable.

condition, then introducing such body into a container without ex osinit to the atmosphere, and immediate y su jectng it to pressure to' forcethe body through a die.

In testimony whereof, I aiix my signature, in 'the presence of twoWitnesses.

i GEORGE BILLARD BENJAMIN. Witnesses: FRANK OCoNNon, M. G. CRAWFORD.

